Update git submodules

Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 0514d12f76335aa3bf3cfccaef3864fd91a54444
  - Merge "split single and plural graph inventory uris"
  - split single and plural graph inventory uris

    split single and plural graph inventory uris
    updated all object references in MSO using graph inventory plurals
    corrected unit test stubbings
    added additional unit tests
    correct interfaces to return plural after related-to
    modified the way http aware uris are built
    reformated interfaces to no longer duplicate methods
    corrected issues with identity of unbuilt uris
    removed AAIUri references from groovy files
    fixed clone behavior on Uri objects

    Issue-ID: SO-2743
    Signed-off-by: Benjamin, Max (mb388a) <mb388a@att.com>
    Change-Id: I37aa2a13dcbf010b6c82ad73af3be5db5d9bd673